UITextView automatic scroll down

Question

I have an UIView and I add a editable UITextView to it,

UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(5, 5, 2         


        

Answer 1

I found that if the text added to the UITextView contained carriage returns, then the textview would not scroll correctly.

I added the logic as follows to allow the bounds to be correctly calculated before scrolling to range.

BOOL autoscroll = NO;

//I added a 10 px buffer here to allow for better detection as the textview is auto populated 
if (textView.contentOffset.y >= (textView.contentSize.height - textView.frame.size.height - 10))
{
    autoscroll = YES;
}

[textView setText:messageString];
[textView layoutSubviews];

if(autoscroll) {
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)),     dispatch_get_main_queue(), ^{
        [textView scrollRangeToVisible:NSMakeRange(textView.text.length - 1, 1)];
    });
}